157308215261 has 8 divisors (see below), whose sum is σ = 159917641848. Its totient is φ = 154699776000.

The previous prime is 157308215201. The next prime is 157308215291. The reversal of 157308215261 is 162512803751.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 306040036 + 157002175225 = 17494^2 + 396235^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 157308215261 - 2¹⁰ = 157308214237 is a prime.

It is a super-2 number, since 2×157308215261² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157308215201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77981 + ... + 566301.

It is an arithmetic number, because the mean of its divisors is an integer number (19989705231).

Almost surely, 2^157308215261 is an apocalyptic number.

It is an amenable number.

157308215261 is a deficient number, since it is larger than the sum of its proper divisors (2609426587).

157308215261 is an equidigital number, since it uses as much as digits as its factorization.

157308215261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493663.

The product of its (nonzero) digits is 100800, while the sum is 41.

The spelling of 157308215261 in words is "one hundred fifty-seven billion, three hundred eight million, two hundred fifteen thousand, two hundred sixty-one".